Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4491b5b640139483ca35dae91dee1f6f3366e70a4ff9d125aba6e500b8bb520' 
  AND token = 'aXuYmjcsTPOmPmUH0Xag90eI3nHlV8JSCB3T5+jAX7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}